|
|
The methodics of plant nutrition and fertilization by potassium
Kunzová, Eva
The methodics inform about situation in plant nutrition and fertilization by potassium on arable soil in Czech Republic. Methodics is found on utilize analytical procedure for determination of content available potassium (Mehlich 3), whose it is possible subsequently use for calculation optimal fertilization.
Fulltext:  PDF
|
|
|
Effect of fertilization on primary production of a herbaceous wetland stand
SLÁMA, Miroslav
The bachelor thesis is part of the project GA CR 526/09/1545, which explores the relationship between the carbon cycle, soil and wetland plants in varying conditions of external environment. Within this project total abovengroud biomass produktion was evaluated at the site Hamerské louky in the floodplain of the river Nežárka. Effect of fertilization on these sites is investigated since the beginning of the growing season 2006. On average, the highest biomass yield (all live and dead biomass except litterfall) from the first sampling (10.6.2009) was reached on the site with high-intensity fertilization (494,89 g.m-2). The highest living biomass yield was also reached on the site with high-intensity fertilization (on average 443,88 gm-2). The highest biomass of the stubble from the first sampling was recorded on sites without fertilization (107,14 g.m-2) as well as litterfall (56,05 g.m-2). The difference between treatments were not statistically singnificant. Annual production of aboveground biomass was 823.99 gm-2 in variants with high-intensity fertilization, 642.64 gm-2 in slightly variant fertilization and 698.14 gm-2 in variants without fertilization
|
|
|
Comparison of the reproduction of the goats on the ecological and the conventional farm
PRAVDOVÁ, Lenka
The aim of my diploma thesis is comparison and evaluation of reproduction of goats on an eco-farm and on a conventional farm. Measures of reproduction of observed herds were assessed in the years of 2009 and 2010 on an eco-farm Hana Langová and on a conventional farm Bára Schneedorferová. On an eco-farm, a herd of 20 does was observed. Crossbreeds of White shorthaired goat, Brown shorthair goat, Boer goat and Anglo-Nubian goat; all bred with a White shorthaired buck and a Boer buck. On a conventional farm, a herd of 24 White shorthaired does and two crossbred does of White and Brown shorthaired goat was observed in 2009. In 2010, only 18 does were observed. In both years the does were bred with two Brown shorthair bucks. The measured results were compared with milk efficiency results between the two years and also between the farms. In both years, higher fertility was discovered on an eco-farm. On a conventional farm, very low fertility was observed in 2009 (116 %). On the other hand, fertilization was higher than on an eco-farm in both years. Very big difference was also observed in the ratio of male kids, which was in both years higher on a conventional farm, where all the bred animals (apart from one) are hornless. Reproduction is to a high extent influenced by external environmental factors and to a very small extent by genetics. A whole range of possible effects was omitted from the observations, however, the main ones were noted. Of all the observed measures of reproduction, the only one which could be substantially influenced by the breeding method is fertility.
|
|
|
Effect of mineral nutrient availability and flooding on the growth of Carex acuta in a mesocosm experiment
SYCHROVÁ, Jana
This MSc thesis is part of the project GACR 526/09/1545 Importance of newly assimilated carbon for the plant-soil interactions in wet grassland ecosystems in varying environmental conditions, which focuses on the effects of eutrophication on selected wet meadows with mineral or organic soil in the Trebon Biosphere Reserve. The results of this project will serve as a basis for developing a suitable ecosystem management for wet meadows, especially for sites registered as nature reserves. Pot experiments were carried out with Carex acuta, a dominant species of wet meadows that has already been subject of many studies. The aim of this work was to find out how C. acuta responds to different levels of fertilization and soil flooding under controlled conditions. The growth of the generative shoots of C. acuta was significantly affected by fertilization. The growth of vegetative shoots was significantly influenced by the soil organic matter content and fertilizer addition. The vegetative shoots reached greater length than the generative shoots. The pot experiment indicates that fertilization has not a large influence on the growth of C. acuta. This finding may explain field observations that C. acuta is gradually replaced in eutrophic habitats by stronger competitors, especially Phalaris arundinacea.
|
|
| |
|
|
REPRODUCTION OF BARBEL (Barbus barbus L.) UNDER CONTROLLED CONDITIONS.
VAVREČKA, Antonín
Barbel (Barbus barbus L.) is autochthonous species with batch-spawning, incident in the whole territory in the Czech republic. Number of this species was decrease markedly at last thirty years ago. Continual fish production is possible obtained to creation breeding under controlled conditions. Aim of thesis was detect basic characteristics of reproduktion under controlled conditions in fish breeding object VÚHR JU Vodňany. Fertilization, hatching performance was detect and quality offspring by osmotic test subsequently. These realized valuables about domesticated barbel were compared with same valuables hormonal induce ovulation adult fish and with valuables in spawning barbel directly in place of catching. The best results fertilization, hatching performance and resistance of larvae were reached in barbel spawning after cathing fish in the river Doubrava (Čáslavsko). After that follows group fish treated by hormonal preparation in the hatchery in Třebíč. Domesticated barbel spawning from January to June in periodic intervals, but their characteristics of reproduction are the worst demonstrably.
|
|
|
Direct effect of eutrophication on microbial processes in wet meadows soils with accent on nitrogen cycle
MACH, Jiří
Increased nutrient input to wet meadows ecosystems often leads to eutrophication. This thesis observes direct effect of fertilization on microbial processes and transformations of nitrogen in three different types of soils. A laboratory experiment consisted in one-shot nutrient addition (fertilizer NPK). Changes in C, N, P microbial biomass, changes in transformations of nitrogen (nitrification, mineralization N, asimilation N, denitrification) and changes in mineralization C (soil respiration) were studied during 21 days.
|
|
|
The effect of fertilization by nitrogen on leaves of free amino acids in plants
Neuberg, M. ; Pavlík, Milan ; Balík, J. ; Kaliszová, R. ; Pavlíková, D.
The effect of different fertilization systems, especially CULTAN (Controlled Uptake Long Term Ammonium Nutrition), on levels of selected amino acids (alanine, glycine, serine, asparagine and glutamine) was investigated in this study. As modeling plant was used maize (Zea mays L.; hybrid Rivaldo) and levels of amino acid were measured by GC-MS. We found significant difference in the levels of certain amino acids. Concentration of alanine and glutamine was higher by treatment with urea ammonium nitrate solution (DAM 390) compared with individuals treated by ammonium nitrate.
|
|
| |
|
| |
guest ::
